I have a PRTG working as Master and Failover. Both the PRTG nodes are operational in 2 separate locations. Both the PRTG have access to Internet, but PRTG nodes(Master and Failover) are not connected through Internet, rather through a dedicated MPLS link.
Now the scenario is, if the internet connection at Master PRTG's end stops working, we do not get any email from Master, which is obvious, but since the cluster sensor between the Master and Failover Node remains up, as they are reachable through MPLS link, the Failover node does not become Master and we don't receive any email. Unless someone opens the PRTG dashboard and gets to know about it.
So, how could we resolve this ? Is there any setting in PRTG which force the Failover node to check with the Master.. and see if the Master is not having Internet connection, the Failover Node starts sending emails on behalf of Master.